1 /* 2 * Copyright (c) 2003, 2022, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package com.sun.tools.javac.comp; 27 28 import java.util.ArrayList; 29 import java.util.HashSet; 30 import java.util.Set; 31 import java.util.function.BiConsumer; 32 import java.util.stream.Collectors; 33 34 import javax.tools.JavaFileObject; 35 36 import com.sun.tools.javac.code.*; 37 import com.sun.tools.javac.code.Lint.LintCategory; 38 import com.sun.tools.javac.code.Scope.ImportFilter; 39 import com.sun.tools.javac.code.Scope.NamedImportScope; 40 import com.sun.tools.javac.code.Scope.StarImportScope; 41 import com.sun.tools.javac.code.Scope.WriteableScope; 42 import com.sun.tools.javac.code.Source.Feature; 43 import com.sun.tools.javac.comp.Annotate.AnnotationTypeMetadata; 44 import com.sun.tools.javac.jvm.Target; 45 import com.sun.tools.javac.tree.*; 46 import com.sun.tools.javac.util.*; 47 import com.sun.tools.javac.util.DefinedBy.Api; 48 49 import com.sun.tools.javac.code.Symbol.*; 50 import com.sun.tools.javac.code.Type.*; 51 import com.sun.tools.javac.resources.CompilerProperties.Errors; 52 import com.sun.tools.javac.tree.JCTree.*; 53 54 import static com.sun.tools.javac.code.Flags.*; 55 import static com.sun.tools.javac.code.Flags.ANNOTATION; 56 import static com.sun.tools.javac.code.Flags.SYNCHRONIZED; 57 import static com.sun.tools.javac.code.Scope.LookupKind.NON_RECURSIVE; 58 import static com.sun.tools.javac.code.Kinds.Kind.*; 59 import static com.sun.tools.javac.code.TypeTag.CLASS; 60 import static com.sun.tools.javac.code.TypeTag.ERROR; 61 import com.sun.tools.javac.resources.CompilerProperties.Fragments; 62 63 import static com.sun.tools.javac.code.TypeTag.*; 64 import static com.sun.tools.javac.tree.JCTree.Tag.*; 65 66 import com.sun.tools.javac.util.Dependencies.CompletionCause; 67 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticFlag; 68 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition; 69 70 /** This is the second phase of Enter, in which classes are completed 71 * by resolving their headers and entering their members in the into 72 * the class scope. See Enter for an overall overview. 73 * 74 * This class uses internal phases to process the classes. When a phase 75 * processes classes, the lower phases are not invoked until all classes 76 * pass through the current phase. Note that it is possible that upper phases 77 * are run due to recursive completion. The internal phases are: 78 * - ImportPhase: shallow pass through imports, adds information about imports 79 * the NamedImportScope and StarImportScope, but avoids queries 80 * about class hierarchy. 81 * - HierarchyPhase: resolves the supertypes of the given class. Does not handle 82 * type parameters of the class or type argument of the supertypes. 83 * - HeaderPhase: finishes analysis of the header of the given class by resolving 84 * type parameters, attributing supertypes including type arguments 85 * and scheduling full annotation attribution. This phase also adds 86 * a synthetic default constructor if needed and synthetic "this" field. 87 * - MembersPhase: resolves headers for fields, methods and constructors in the given class. 88 * Also generates synthetic enum members. 89 * 90 * <p><b>This is NOT part of any supported API. 91 * If you write code that depends on this, you do so at your own risk. 92 * This code and its internal interfaces are subject to change or 93 * deletion without notice.</b> 94 */ 95 public class TypeEnter implements Completer { 96 protected static final Context.Key<TypeEnter> typeEnterKey = new Context.Key<>(); 97 98 /** A switch to determine whether we check for package/class conflicts 99 */ 100 static final boolean checkClash = true; 101 102 private final Names names; 103 private final Enter enter; 104 private final MemberEnter memberEnter; 105 private final Log log; 106 private final Check chk; 107 private final Attr attr; 108 private final Symtab syms; 109 private final TreeMaker make; 110 private final Todo todo; 111 private final Annotate annotate; 112 private final TypeAnnotations typeAnnotations; 113 private final Types types; 114 private final DeferredLintHandler deferredLintHandler; 115 private final Lint lint; 116 private final TypeEnvs typeEnvs; 117 private final Dependencies dependencies; 118 private final Preview preview; 119 120 public static TypeEnter instance(Context context) { 121 TypeEnter instance = context.get(typeEnterKey); 122 if (instance == null) 123 instance = new TypeEnter(context); 124 return instance; 125 } 126 127 protected TypeEnter(Context context) { 128 context.put(typeEnterKey, this); 129 names = Names.instance(context); 130 enter = Enter.instance(context); 131 memberEnter = MemberEnter.instance(context); 132 log = Log.instance(context); 133 chk = Check.instance(context); 134 attr = Attr.instance(context); 135 syms = Symtab.instance(context); 136 make = TreeMaker.instance(context); 137 todo = Todo.instance(context); 138 annotate = Annotate.instance(context); 139 typeAnnotations = TypeAnnotations.instance(context); 140 types = Types.instance(context); 141 deferredLintHandler = DeferredLintHandler.instance(context); 142 lint = Lint.instance(context); 143 typeEnvs = TypeEnvs.instance(context); 144 dependencies = Dependencies.instance(context); 145 preview = Preview.instance(context); 146 Source source = Source.instance(context); 147 allowTypeAnnos = Feature.TYPE_ANNOTATIONS.allowedInSource(source); 148 allowDeprecationOnImport = Feature.DEPRECATION_ON_IMPORT.allowedInSource(source); 149 } 150 151 /** Switch: support type annotations. 152 */ 153 boolean allowTypeAnnos; 154 155 /** 156 * Switch: should deprecation warnings be issued on import 157 */ 158 boolean allowDeprecationOnImport; 159 160 /** A flag to disable completion from time to time during member 161 * enter, as we only need to look up types. This avoids 162 * unnecessarily deep recursion. 163 */ 164 boolean completionEnabled = true; 165 166 /* Verify Imports: 167 */ 168 protected void ensureImportsChecked(List<JCCompilationUnit> trees) { 169 // if there remain any unimported toplevels (these must have 170 // no classes at all), process their import statements as well. 171 for (JCCompilationUnit tree : trees) { 172 if (!tree.starImportScope.isFilled()) { 173 Env<AttrContext> topEnv = enter.topLevelEnv(tree); 174 finishImports(tree, () -> { completeClass.resolveImports(tree, topEnv); }); 175 } 176 } 177 } 178 179 /* ******************************************************************** 180 * Source completer 181 *********************************************************************/ 182 183 /** Complete entering a class. 184 * @param sym The symbol of the class to be completed. 185 */ 186 @Override 187 public void complete(Symbol sym) throws CompletionFailure { 188 // Suppress some (recursive) MemberEnter invocations 189 if (!completionEnabled) { 190 // Re-install same completer for next time around and return. 191 Assert.check((sym.flags() & Flags.COMPOUND) == 0); 192 sym.completer = this; 193 return; 194 } 195 196 try { 197 annotate.blockAnnotations(); 198 sym.flags_field |= UNATTRIBUTED; 199 200 List<Env<AttrContext>> queue; 201 202 dependencies.push((ClassSymbol) sym, CompletionCause.MEMBER_ENTER); 203 try { 204 queue = completeClass.completeEnvs(List.of(typeEnvs.get((ClassSymbol) sym))); 205 } finally { 206 dependencies.pop(); 207 } 208 209 if (!queue.isEmpty()) { 210 Set<JCCompilationUnit> seen = new HashSet<>(); 211 212 for (Env<AttrContext> env : queue) { 213 if (env.toplevel.defs.contains(env.enclClass) && seen.add(env.toplevel)) { 214 finishImports(env.toplevel, () -> {}); 215 } 216 } 217 } 218 } finally { 219 annotate.unblockAnnotations(); 220 } 221 } 222 223 void finishImports(JCCompilationUnit toplevel, Runnable resolve) { 224 JavaFileObject prev = log.useSource(toplevel.sourcefile); 225 try { 226 resolve.run(); 227 chk.checkImportsUnique(toplevel); 228 chk.checkImportsResolvable(toplevel); 229 chk.checkImportedPackagesObservable(toplevel); 230 toplevel.namedImportScope.finalizeScope(); 231 toplevel.starImportScope.finalizeScope(); 232 } catch (CompletionFailure cf) { 233 chk.completionError(toplevel.pos(), cf); 234 } finally { 235 log.useSource(prev); 236 } 237 } 238 239 abstract class Phase { 240 private final ListBuffer<Env<AttrContext>> queue = new ListBuffer<>(); 241 private final Phase next; 242 private final CompletionCause phaseName; 243 244 Phase(CompletionCause phaseName, Phase next) { 245 this.phaseName = phaseName; 246 this.next = next; 247 } 248 249 public final List<Env<AttrContext>> completeEnvs(List<Env<AttrContext>> envs) { 250 boolean firstToComplete = queue.isEmpty(); 251 252 Phase prevTopLevelPhase = topLevelPhase; 253 boolean success = false; 254 255 try { 256 topLevelPhase = this; 257 doCompleteEnvs(envs); 258 success = true; 259 } finally { 260 topLevelPhase = prevTopLevelPhase; 261 if (!success && firstToComplete) { 262 //an exception was thrown, e.g. BreakAttr: 263 //the queue would become stale, clear it: 264 queue.clear(); 265 } 266 } 267 268 if (firstToComplete) { 269 List<Env<AttrContext>> out = queue.toList(); 270 271 queue.clear(); 272 return next != null ? next.completeEnvs(out) : out; 273 } else { 274 return List.nil(); 275 } 276 } 277 278 protected void doCompleteEnvs(List<Env<AttrContext>> envs) { 279 for (Env<AttrContext> env : envs) { 280 JCClassDecl tree = (JCClassDecl)env.tree; 281 282 queue.add(env); 283 284 JavaFileObject prev = log.useSource(env.toplevel.sourcefile); 285 DiagnosticPosition prevLintPos = deferredLintHandler.setPos(tree.pos()); 286 try { 287 dependencies.push(env.enclClass.sym, phaseName); 288 runPhase(env); 289 } catch (CompletionFailure ex) { 290 chk.completionError(tree.pos(), ex); 291 } finally { 292 dependencies.pop(); 293 deferredLintHandler.setPos(prevLintPos); 294 log.useSource(prev); 295 } 296 } 297 } 298 299 protected abstract void runPhase(Env<AttrContext> env); 300 } 301 302 private final ImportsPhase completeClass = new ImportsPhase(); 303 private Phase topLevelPhase; 304 305 /**Analyze import clauses. 306 */ 307 private final class ImportsPhase extends Phase { 308 309 public ImportsPhase() { 310 super(CompletionCause.IMPORTS_PHASE, new HierarchyPhase()); 311 } 312 313 Env<AttrContext> env; 314 ImportFilter staticImportFilter; 315 ImportFilter typeImportFilter; 316 BiConsumer<JCImport, CompletionFailure> cfHandler = 317 (imp, cf) -> chk.completionError(imp.pos(), cf); 318 319 @Override 320 protected void runPhase(Env<AttrContext> env) { 321 JCClassDecl tree = env.enclClass; 322 ClassSymbol sym = tree.sym; 323 324 // If sym is a toplevel-class, make sure any import 325 // clauses in its source file have been seen. 326 if (sym.owner.kind == PCK) { 327 resolveImports(env.toplevel, env.enclosing(TOPLEVEL)); 328 todo.append(env); 329 } 330 331 if (sym.owner.kind == TYP) 332 sym.owner.complete(); 333 } 334 335 private void resolveImports(JCCompilationUnit tree, Env<AttrContext> env) { 336 if (tree.starImportScope.isFilled()) { 337 // we must have already processed this toplevel 338 return; 339 } 340 341 ImportFilter prevStaticImportFilter = staticImportFilter; 342 ImportFilter prevTypeImportFilter = typeImportFilter; 343 DiagnosticPosition prevLintPos = deferredLintHandler.immediate(); 344 Lint prevLint = chk.setLint(lint); 345 Env<AttrContext> prevEnv = this.env; 346 try { 347 this.env = env; 348 final PackageSymbol packge = env.toplevel.packge; 349 this.staticImportFilter = 350 (origin, sym) -> sym.isStatic() && 351 chk.importAccessible(sym, packge) && 352 sym.isMemberOf((TypeSymbol) origin.owner, types); 353 this.typeImportFilter = 354 (origin, sym) -> sym.kind == TYP && 355 chk.importAccessible(sym, packge); 356 357 // Import-on-demand java.lang. 358 PackageSymbol javaLang = syms.enterPackage(syms.java_base, names.java_lang); 359 if (javaLang.members().isEmpty() && !javaLang.exists()) { 360 log.error(Errors.NoJavaLang); 361 throw new Abort(); 362 } 363 importAll(make.at(tree.pos()).Import(make.QualIdent(javaLang), false), javaLang, env); 364 365 JCModuleDecl decl = tree.getModuleDecl(); 366 367 // Process the package def and all import clauses. 368 if (tree.getPackage() != null && decl == null) 369 checkClassPackageClash(tree.getPackage()); 370 371 for (JCImport imp : tree.getImports()) { 372 doImport(imp); 373 } 374 375 if (decl != null) { 376 DiagnosticPosition prevCheckDeprecatedLintPos = deferredLintHandler.setPos(decl.pos()); 377 try { 378 //check @Deprecated: 379 markDeprecated(decl.sym, decl.mods.annotations, env); 380 } finally { 381 deferredLintHandler.setPos(prevCheckDeprecatedLintPos); 382 } 383 // process module annotations 384 annotate.annotateLater(decl.mods.annotations, env, env.toplevel.modle, decl.pos()); 385 } 386 } finally { 387 this.env = prevEnv; 388 chk.setLint(prevLint); 389 deferredLintHandler.setPos(prevLintPos); 390 this.staticImportFilter = prevStaticImportFilter; 391 this.typeImportFilter = prevTypeImportFilter; 392 } 393 } 394 395 private void checkClassPackageClash(JCPackageDecl tree) { 396 // check that no class exists with same fully qualified name as 397 // toplevel package 398 if (checkClash && tree.pid != null) { 399 Symbol p = env.toplevel.packge; 400 while (p.owner != syms.rootPackage) { 401 p.owner.complete(); // enter all class members of p 402 //need to lookup the owning module/package: 403 PackageSymbol pack = syms.lookupPackage(env.toplevel.modle, p.owner.getQualifiedName()); 404 if (syms.getClass(pack.modle, p.getQualifiedName()) != null) { 405 log.error(tree.pos, 406 Errors.PkgClashesWithClassOfSameName(p)); 407 } 408 p = p.owner; 409 } 410 } 411 // process package annotations 412 annotate.annotateLater(tree.annotations, env, env.toplevel.packge, tree.pos()); 413 } 414 415 private void doImport(JCImport tree) { 416 JCFieldAccess imp = (JCFieldAccess)tree.qualid; 417 Name name = TreeInfo.name(imp); 418 419 // Create a local environment pointing to this tree to disable 420 // effects of other imports in Resolve.findGlobalType 421 Env<AttrContext> localEnv = env.dup(tree); 422 423 TypeSymbol p = attr.attribImportQualifier(tree, localEnv).tsym; 424 if (name == names.asterisk) { 425 // Import on demand. 426 chk.checkCanonical(imp.selected); 427 if (tree.staticImport) 428 importStaticAll(tree, p, env); 429 else 430 importAll(tree, p, env); 431 } else { 432 // Named type import. 433 if (tree.staticImport) { 434 importNamedStatic(tree, p, name, localEnv); 435 chk.checkCanonical(imp.selected); 436 } else { 437 Type importedType = attribImportType(imp, localEnv); 438 Type originalType = importedType.getOriginalType(); 439 TypeSymbol c = originalType.hasTag(CLASS) ? originalType.tsym : importedType.tsym; 440 chk.checkCanonical(imp); 441 importNamed(tree.pos(), c, env, tree); 442 } 443 } 444 } 445 446 Type attribImportType(JCTree tree, Env<AttrContext> env) { 447 Assert.check(completionEnabled); 448 Lint prevLint = chk.setLint(allowDeprecationOnImport ? 449 lint : lint.suppress(LintCategory.DEPRECATION, LintCategory.REMOVAL, LintCategory.PREVIEW)); 450 try { 451 // To prevent deep recursion, suppress completion of some 452 // types. 453 completionEnabled = false; 454 return attr.attribType(tree, env); 455 } finally { 456 completionEnabled = true; 457 chk.setLint(prevLint); 458 } 459 } 460 461 /** Import all classes of a class or package on demand. 462 * @param imp The import that is being handled. 463 * @param tsym The class or package the members of which are imported. 464 * @param env The env in which the imported classes will be entered. 465 */ 466 private void importAll(JCImport imp, 467 final TypeSymbol tsym, 468 Env<AttrContext> env) { 469 env.toplevel.starImportScope.importAll(types, tsym.members(), typeImportFilter, imp, cfHandler); 470 } 471 472 /** Import all static members of a class or package on demand. 473 * @param imp The import that is being handled. 474 * @param tsym The class or package the members of which are imported. 475 * @param env The env in which the imported classes will be entered. 476 */ 477 private void importStaticAll(JCImport imp, 478 final TypeSymbol tsym, 479 Env<AttrContext> env) { 480 final StarImportScope toScope = env.toplevel.starImportScope; 481 final TypeSymbol origin = tsym; 482 483 toScope.importAll(types, origin.members(), staticImportFilter, imp, cfHandler); 484 } 485 486 /** Import statics types of a given name. Non-types are handled in Attr. 487 * @param imp The import that is being handled. 488 * @param tsym The class from which the name is imported. 489 * @param name The (simple) name being imported. 490 * @param env The environment containing the named import 491 * scope to add to. 492 */ 493 private void importNamedStatic(final JCImport imp, 494 final TypeSymbol tsym, 495 final Name name, 496 final Env<AttrContext> env) { 497 if (tsym.kind != TYP) { 498 log.error(DiagnosticFlag.RECOVERABLE, imp.pos(), Errors.StaticImpOnlyClassesAndInterfaces); 499 return; 500 } 501 502 final NamedImportScope toScope = env.toplevel.namedImportScope; 503 final Scope originMembers = tsym.members(); 504 505 imp.importScope = toScope.importByName(types, originMembers, name, staticImportFilter, imp, cfHandler); 506 } 507 508 /** Import given class. 509 * @param pos Position to be used for error reporting. 510 * @param tsym The class to be imported. 511 * @param env The environment containing the named import 512 * scope to add to. 513 */ 514 private void importNamed(DiagnosticPosition pos, final Symbol tsym, Env<AttrContext> env, JCImport imp) { 515 if (tsym.kind == TYP) 516 imp.importScope = env.toplevel.namedImportScope.importType(tsym.owner.members(), tsym.owner.members(), tsym); 517 } 518 519 } 520 521 /**Defines common utility methods used by the HierarchyPhase and HeaderPhase. 522 */ 523 private abstract class AbstractHeaderPhase extends Phase { 524 525 public AbstractHeaderPhase(CompletionCause phaseName, Phase next) { 526 super(phaseName, next); 527 } 528 529 protected Env<AttrContext> baseEnv(JCClassDecl tree, Env<AttrContext> env) { 530 WriteableScope baseScope = WriteableScope.create(tree.sym); 531 //import already entered local classes into base scope 532 for (Symbol sym : env.outer.info.scope.getSymbols(NON_RECURSIVE)) { 533 if (sym.isDirectlyOrIndirectlyLocal()) { 534 baseScope.enter(sym); 535 } 536 } 537 //import current type-parameters into base scope 538 if (tree.typarams != null) 539 for (List<JCTypeParameter> typarams = tree.typarams; 540 typarams.nonEmpty(); 541 typarams = typarams.tail) 542 baseScope.enter(typarams.head.type.tsym); 543 Env<AttrContext> outer = env.outer; // the base clause can't see members of this class 544 Env<AttrContext> localEnv = outer.dup(tree, outer.info.dup(baseScope)); 545 localEnv.baseClause = true; 546 localEnv.outer = outer; 547 localEnv.info.isSelfCall = false; 548 return localEnv; 549 } 550 551 /** Generate a base clause for an enum type. 552 * @param pos The position for trees and diagnostics, if any 553 * @param c The class symbol of the enum 554 */ 555 protected JCExpression enumBase(int pos, ClassSymbol c) { 556 JCExpression result = make.at(pos). 557 TypeApply(make.QualIdent(syms.enumSym), 558 List.of(make.Type(c.type))); 559 return result; 560 } 561 562 /** Generate a base clause for a record type. 563 * @param pos The position for trees and diagnostics, if any 564 * @param c The class symbol of the record 565 */ 566 protected JCExpression recordBase(int pos, ClassSymbol c) { 567 JCExpression result = make.at(pos). 568 QualIdent(syms.recordType.tsym); 569 return result; 570 } 571 572 protected Type modelMissingTypes(Env<AttrContext> env, Type t, final JCExpression tree, final boolean interfaceExpected) { 573 if (!t.hasTag(ERROR)) 574 return t; 575 576 return new ErrorType(t.getOriginalType(), t.tsym) { 577 private Type modelType; 578 579 @Override 580 public Type getModelType() { 581 if (modelType == null) 582 modelType = new Synthesizer(env.toplevel.modle, getOriginalType(), interfaceExpected).visit(tree); 583 return modelType; 584 } 585 }; 586 } 587 // where: 588 private class Synthesizer extends JCTree.Visitor { 589 ModuleSymbol msym; 590 Type originalType; 591 boolean interfaceExpected; 592 List<ClassSymbol> synthesizedSymbols = List.nil(); 593 Type result; 594 595 Synthesizer(ModuleSymbol msym, Type originalType, boolean interfaceExpected) { 596 this.msym = msym; 597 this.originalType = originalType; 598 this.interfaceExpected = interfaceExpected; 599 } 600 601 Type visit(JCTree tree) { 602 tree.accept(this); 603 return result; 604 } 605 606 List<Type> visit(List<? extends JCTree> trees) { 607 ListBuffer<Type> lb = new ListBuffer<>(); 608 for (JCTree t: trees) 609 lb.append(visit(t)); 610 return lb.toList(); 611 } 612 613 @Override 614 public void visitTree(JCTree tree) { 615 result = syms.errType; 616 } 617 618 @Override 619 public void visitIdent(JCIdent tree) { 620 if (!tree.type.hasTag(ERROR)) { 621 result = tree.type; 622 } else { 623 result = synthesizeClass(tree.name, msym.unnamedPackage).type; 624 } 625 } 626 627 @Override 628 public void visitSelect(JCFieldAccess tree) { 629 if (!tree.type.hasTag(ERROR)) { 630 result = tree.type; 631 } else { 632 Type selectedType; 633 boolean prev = interfaceExpected; 634 try { 635 interfaceExpected = false; 636 selectedType = visit(tree.selected); 637 } finally { 638 interfaceExpected = prev; 639 } 640 ClassSymbol c = synthesizeClass(tree.name, selectedType.tsym); 641 result = c.type; 642 } 643 } 644 645 @Override 646 public void visitTypeApply(JCTypeApply tree) { 647 if (!tree.type.hasTag(ERROR)) { 648 result = tree.type; 649 } else { 650 ClassType clazzType = (ClassType) visit(tree.clazz); 651 if (synthesizedSymbols.contains(clazzType.tsym)) 652 synthesizeTyparams((ClassSymbol) clazzType.tsym, tree.arguments.size()); 653 final List<Type> actuals = visit(tree.arguments); 654 result = new ErrorType(tree.type, clazzType.tsym) { 655 @Override @DefinedBy(Api.LANGUAGE_MODEL) 656 public List<Type> getTypeArguments() { 657 return actuals; 658 } 659 }; 660 } 661 } 662 663 ClassSymbol synthesizeClass(Name name, Symbol owner) { 664 int flags = interfaceExpected ? INTERFACE : 0; 665 ClassSymbol c = new ClassSymbol(flags, name, owner); 666 c.members_field = new Scope.ErrorScope(c); 667 c.type = new ErrorType(originalType, c) { 668 @Override @DefinedBy(Api.LANGUAGE_MODEL) 669 public List<Type> getTypeArguments() { 670 return typarams_field; 671 } 672 }; 673 synthesizedSymbols = synthesizedSymbols.prepend(c); 674 return c; 675 } 676 677 void synthesizeTyparams(ClassSymbol sym, int n) { 678 ClassType ct = (ClassType) sym.type; 679 Assert.check(ct.typarams_field.isEmpty()); 680 if (n == 1) { 681 TypeVar v = new TypeVar(names.fromString("T"), sym, syms.botType); 682 ct.typarams_field = ct.typarams_field.prepend(v); 683 } else { 684 for (int i = n; i > 0; i--) { 685 TypeVar v = new TypeVar(names.fromString("T" + i), sym, 686 syms.botType); 687 ct.typarams_field = ct.typarams_field.prepend(v); 688 } 689 } 690 } 691 } 692 693 protected void attribSuperTypes(Env<AttrContext> env, Env<AttrContext> baseEnv) { 694 JCClassDecl tree = env.enclClass; 695 ClassSymbol sym = tree.sym; 696 ClassType ct = (ClassType)sym.type; 697 // Determine supertype. 698 Type supertype; 699 JCExpression extending; 700 701 if (tree.extending != null) { 702 extending = clearTypeParams(tree.extending); 703 supertype = attr.attribBase(extending, baseEnv, true, false, true); 704 if (supertype == syms.recordType) { 705 log.error(tree, Errors.InvalidSupertypeRecord(supertype.tsym)); 706 } 707 } else { 708 extending = null; 709 supertype = ((tree.mods.flags & Flags.ENUM) != 0) 710 ? attr.attribBase(extending = enumBase(tree.pos, sym), baseEnv, 711 true, false, false) 712 : (sym.fullname == names.java_lang_Object) 713 ? Type.noType 714 : sym.isRecord() 715 ? attr.attribBase(extending = recordBase(tree.pos, sym), baseEnv, 716 true, false, false) 717 : syms.objectType; 718 } 719 ct.supertype_field = modelMissingTypes(baseEnv, supertype, extending, false); 720 721 // Determine interfaces. 722 ListBuffer<Type> interfaces = new ListBuffer<>(); 723 ListBuffer<Type> all_interfaces = null; // lazy init 724 List<JCExpression> interfaceTrees = tree.implementing; 725 for (JCExpression iface : interfaceTrees) { 726 iface = clearTypeParams(iface); 727 Type it = attr.attribBase(iface, baseEnv, false, true, true); 728 if (it.hasTag(CLASS)) { 729 interfaces.append(it); 730 if (all_interfaces != null) all_interfaces.append(it); 731 } else { 732 if (all_interfaces == null) 733 all_interfaces = new ListBuffer<Type>().appendList(interfaces); 734 all_interfaces.append(modelMissingTypes(baseEnv, it, iface, true)); 735 } 736 } 737 738 // Determine permits. 739 ListBuffer<Symbol> permittedSubtypeSymbols = new ListBuffer<>(); 740 List<JCExpression> permittedTrees = tree.permitting; 741 for (JCExpression permitted : permittedTrees) { 742 Type pt = attr.attribBase(permitted, baseEnv, false, false, false); 743 permittedSubtypeSymbols.append(pt.tsym); 744 } 745 746 if ((sym.flags_field & ANNOTATION) != 0) { 747 ct.interfaces_field = List.of(syms.annotationType); 748 ct.all_interfaces_field = ct.interfaces_field; 749 } else { 750 ct.interfaces_field = interfaces.toList(); 751 ct.all_interfaces_field = (all_interfaces == null) 752 ? ct.interfaces_field : all_interfaces.toList(); 753 } 754 /* it could be that there are already some symbols in the permitted list, for the case 755 * where there are subtypes in the same compilation unit but the permits list is empty 756 * so don't overwrite the permitted list if it is not empty 757 */ 758 if (!permittedSubtypeSymbols.isEmpty()) { 759 sym.permitted = permittedSubtypeSymbols.toList(); 760 } 761 sym.isPermittedExplicit = !permittedSubtypeSymbols.isEmpty(); 762 } 763 //where: 764 protected JCExpression clearTypeParams(JCExpression superType) { 765 return superType; 766 } 767 } 768 769 private final class HierarchyPhase extends AbstractHeaderPhase implements Completer { 770 771 public HierarchyPhase() { 772 super(CompletionCause.HIERARCHY_PHASE, new PermitsPhase()); 773 } 774 775 @Override 776 protected void doCompleteEnvs(List<Env<AttrContext>> envs) { 777 //The ClassSymbols in the envs list may not be in the dependency order. 778 //To get proper results, for every class or interface C, the supertypes of 779 //C must be processed by the HierarchyPhase phase before C. 780 //To achieve that, the HierarchyPhase is registered as the Completer for 781 //all the classes first, and then all the classes are completed. 782 for (Env<AttrContext> env : envs) { 783 env.enclClass.sym.completer = this; 784 } 785 for (Env<AttrContext> env : envs) { 786 env.enclClass.sym.complete(); 787 } 788 } 789 790 @Override 791 protected void runPhase(Env<AttrContext> env) { 792 JCClassDecl tree = env.enclClass; 793 ClassSymbol sym = tree.sym; 794 ClassType ct = (ClassType)sym.type; 795 796 Env<AttrContext> baseEnv = baseEnv(tree, env); 797 798 attribSuperTypes(env, baseEnv); 799 800 if (sym.fullname == names.java_lang_Object) { 801 if (tree.extending != null) { 802 chk.checkNonCyclic(tree.extending.pos(), 803 ct.supertype_field); 804 ct.supertype_field = Type.noType; 805 } 806 else if (tree.implementing.nonEmpty()) { 807 chk.checkNonCyclic(tree.implementing.head.pos(), 808 ct.interfaces_field.head); 809 ct.interfaces_field = List.nil(); 810 } 811 } 812 813 markDeprecated(sym, tree.mods.annotations, baseEnv); 814 815 chk.checkNonCyclicDecl(tree); 816 } 817 //where: 818 @Override 819 protected JCExpression clearTypeParams(JCExpression superType) { 820 switch (superType.getTag()) { 821 case TYPEAPPLY: 822 return ((JCTypeApply) superType).clazz; 823 } 824 825 return superType; 826 } 827 828 @Override 829 public void complete(Symbol sym) throws CompletionFailure { 830 Assert.check((topLevelPhase instanceof ImportsPhase) || 831 (topLevelPhase == this)); 832 833 if (topLevelPhase != this) { 834 //only do the processing based on dependencies in the HierarchyPhase: 835 sym.completer = this; 836 return ; 837 } 838 839 Env<AttrContext> env = typeEnvs.get((ClassSymbol) sym); 840 841 super.doCompleteEnvs(List.of(env)); 842 } 843 844 } 845 846 private final class PermitsPhase extends AbstractHeaderPhase { 847 848 public PermitsPhase() { 849 super(CompletionCause.HIERARCHY_PHASE, new HeaderPhase()); 850 } 851 852 @Override 853 protected void runPhase(Env<AttrContext> env) { 854 JCClassDecl tree = env.enclClass; 855 if (!tree.sym.isAnonymous() || tree.sym.isEnum()) { 856 for (Type supertype : types.directSupertypes(tree.sym.type)) { 857 if (supertype.tsym.kind == TYP) { 858 ClassSymbol supClass = (ClassSymbol) supertype.tsym; 859 Env<AttrContext> supClassEnv = enter.getEnv(supClass); 860 if (supClass.isSealed() && 861 !supClass.isPermittedExplicit && 862 supClassEnv != null && 863 supClassEnv.toplevel == env.toplevel) { 864 supClass.permitted = supClass.permitted.append(tree.sym); 865 } 866 } 867 } 868 } 869 } 870 871 } 872 873 private final class HeaderPhase extends AbstractHeaderPhase { 874 875 public HeaderPhase() { 876 super(CompletionCause.HEADER_PHASE, new RecordPhase()); 877 } 878 879 @Override 880 protected void runPhase(Env<AttrContext> env) { 881 JCClassDecl tree = env.enclClass; 882 ClassSymbol sym = tree.sym; 883 ClassType ct = (ClassType)sym.type; 884 885 // create an environment for evaluating the base clauses 886 Env<AttrContext> baseEnv = baseEnv(tree, env); 887 888 if (tree.extending != null) 889 annotate.queueScanTreeAndTypeAnnotate(tree.extending, baseEnv, sym, tree.pos()); 890 for (JCExpression impl : tree.implementing) 891 annotate.queueScanTreeAndTypeAnnotate(impl, baseEnv, sym, tree.pos()); 892 annotate.flush(); 893 894 attribSuperTypes(env, baseEnv); 895 896 Set<Type> interfaceSet = new HashSet<>(); 897 898 for (JCExpression iface : tree.implementing) { 899 Type it = iface.type; 900 if (it.hasTag(CLASS)) 901 chk.checkNotRepeated(iface.pos(), types.erasure(it), interfaceSet); 902 } 903 904 annotate.annotateLater(tree.mods.annotations, baseEnv, 905 sym, tree.pos()); 906 attr.attribTypeVariables(tree.typarams, baseEnv, false); 907 908 for (JCTypeParameter tp : tree.typarams) 909 annotate.queueScanTreeAndTypeAnnotate(tp, baseEnv, sym, tree.pos()); 910 911 // check that no package exists with same fully qualified name, 912 // but admit classes in the unnamed package which have the same 913 // name as a top-level package. 914 if (checkClash && 915 sym.owner.kind == PCK && sym.owner != env.toplevel.modle.unnamedPackage && 916 syms.packageExists(env.toplevel.modle, sym.fullname)) { 917 log.error(tree.pos, Errors.ClashWithPkgOfSameName(Kinds.kindName(sym),sym)); 918 } 919 if (sym.owner.kind == PCK && (sym.flags_field & PUBLIC) == 0 && 920 !env.toplevel.sourcefile.isNameCompatible(sym.name.toString(),JavaFileObject.Kind.SOURCE)) { 921 sym.flags_field |= AUXILIARY; 922 } 923 } 924 } 925 926 private abstract class AbstractMembersPhase extends Phase { 927 928 public AbstractMembersPhase(CompletionCause completionCause, Phase next) { 929 super(completionCause, next); 930 } 931 932 private boolean completing; 933 private List<Env<AttrContext>> todo = List.nil(); 934 935 @Override 936 protected void doCompleteEnvs(List<Env<AttrContext>> envs) { 937 todo = todo.prependList(envs); 938 if (completing) { 939 return ; //the top-level invocation will handle all envs 940 } 941 boolean prevCompleting = completing; 942 completing = true; 943 try { 944 while (todo.nonEmpty()) { 945 Env<AttrContext> head = todo.head; 946 todo = todo.tail; 947 super.doCompleteEnvs(List.of(head)); 948 } 949 } finally { 950 completing = prevCompleting; 951 } 952 } 953 954 void enterThisAndSuper(ClassSymbol sym, Env<AttrContext> env) { 955 ClassType ct = (ClassType)sym.type; 956 // enter symbols for 'this' into current scope. 957 VarSymbol thisSym = 958 new VarSymbol(FINAL | HASINIT, names._this, sym.type, sym); 959 thisSym.pos = Position.FIRSTPOS; 960 env.info.scope.enter(thisSym); 961 // if this is a class, enter symbol for 'super' into current scope. 962 if ((sym.flags_field & INTERFACE) == 0 && 963 ct.supertype_field.hasTag(CLASS)) { 964 VarSymbol superSym = 965 new VarSymbol(FINAL | HASINIT, names._super, 966 ct.supertype_field, sym); 967 superSym.pos = Position.FIRSTPOS; 968 env.info.scope.enter(superSym); 969 } 970 } 971 } 972 973 private final class RecordPhase extends AbstractMembersPhase { 974 975 public RecordPhase() { 976 super(CompletionCause.RECORD_PHASE, new MembersPhase()); 977 } 978 979 @Override 980 protected void runPhase(Env<AttrContext> env) { 981 JCClassDecl tree = env.enclClass; 982 ClassSymbol sym = tree.sym; 983 if ((sym.flags_field & RECORD) != 0) { 984 List<JCVariableDecl> fields = TreeInfo.recordFields(tree); 985 memberEnter.memberEnter(fields, env); 986 for (JCVariableDecl field : fields) { 987 sym.getRecordComponent(field, true, 988 field.mods.annotations.isEmpty() ? 989 List.nil() : 990 new TreeCopier<JCTree>(make.at(field.pos)).copy(field.mods.annotations)); 991 } 992 993 enterThisAndSuper(sym, env); 994 995 // lets enter all constructors 996 for (JCTree def : tree.defs) { 997 if (TreeInfo.isConstructor(def)) { 998 memberEnter.memberEnter(def, env); 999 } 1000 } 1001 } 1002 } 1003 } 1004 1005 /** Enter member fields and methods of a class 1006 */ 1007 private final class MembersPhase extends AbstractMembersPhase { 1008 1009 public MembersPhase() { 1010 super(CompletionCause.MEMBERS_PHASE, null); 1011 } 1012 1013 @Override 1014 protected void runPhase(Env<AttrContext> env) { 1015 JCClassDecl tree = env.enclClass; 1016 ClassSymbol sym = tree.sym; 1017 ClassType ct = (ClassType)sym.type; 1018 1019 JCTree defaultConstructor = null; 1020 1021 // Add default constructor if needed. 1022 DefaultConstructorHelper helper = getDefaultConstructorHelper(env); 1023 if (helper != null) { 1024 chk.checkDefaultConstructor(sym, tree.pos()); 1025 defaultConstructor = defaultConstructor(make.at(tree.pos), helper); 1026 tree.defs = tree.defs.prepend(defaultConstructor); 1027 } 1028 if (!sym.isRecord()) { 1029 enterThisAndSuper(sym, env); 1030 } 1031 1032 if (!tree.typarams.isEmpty()) { 1033 for (JCTypeParameter tvar : tree.typarams) { 1034 chk.checkNonCyclic(tvar, (TypeVar)tvar.type); 1035 } 1036 } 1037 1038 finishClass(tree, defaultConstructor, env); 1039 1040 if (allowTypeAnnos) { 1041 typeAnnotations.organizeTypeAnnotationsSignatures(env, (JCClassDecl)env.tree); 1042 typeAnnotations.validateTypeAnnotationsSignatures(env, (JCClassDecl)env.tree); 1043 } 1044 } 1045 1046 DefaultConstructorHelper getDefaultConstructorHelper(Env<AttrContext> env) { 1047 JCClassDecl tree = env.enclClass; 1048 ClassSymbol sym = tree.sym; 1049 DefaultConstructorHelper helper = null; 1050 boolean isClassWithoutInit = (sym.flags() & INTERFACE) == 0 && !TreeInfo.hasConstructors(tree.defs); 1051 boolean isRecord = sym.isRecord(); 1052 if (isClassWithoutInit && !isRecord) { 1053 helper = new BasicConstructorHelper(sym); 1054 if (sym.name.isEmpty()) { 1055 JCNewClass nc = (JCNewClass)env.next.tree; 1056 if (nc.constructor != null) { 1057 if (nc.constructor.kind != ERR) { 1058 helper = new AnonClassConstructorHelper(sym, (MethodSymbol)nc.constructor, nc.encl); 1059 } else { 1060 helper = null; 1061 } 1062 } 1063 } 1064 } 1065 if (isRecord) { 1066 JCMethodDecl canonicalInit = null; 1067 if (isClassWithoutInit || (canonicalInit = getCanonicalConstructorDecl(env.enclClass)) == null) { 1068 helper = new RecordConstructorHelper(sym, TreeInfo.recordFields(tree)); 1069 } 1070 if (canonicalInit != null) { 1071 canonicalInit.sym.flags_field |= Flags.RECORD; 1072 } 1073 } 1074 return helper; 1075 } 1076 1077 /** Enter members for a class. 1078 */ 1079 void finishClass(JCClassDecl tree, JCTree defaultConstructor, Env<AttrContext> env) { 1080 if ((tree.mods.flags & Flags.ENUM) != 0 && 1081 !tree.sym.type.hasTag(ERROR) && 1082 (types.supertype(tree.sym.type).tsym.flags() & Flags.ENUM) == 0) { 1083 addEnumMembers(tree, env); 1084 } 1085 boolean isRecord = (tree.sym.flags_field & RECORD) != 0; 1086 List<JCTree> alreadyEntered = null; 1087 if (isRecord) { 1088 alreadyEntered = List.convert(JCTree.class, TreeInfo.recordFields(tree)); 1089 alreadyEntered = alreadyEntered.prependList(tree.defs.stream() 1090 .filter(t -> TreeInfo.isConstructor(t) && t != defaultConstructor).collect(List.collector())); 1091 } 1092 List<JCTree> defsToEnter = isRecord ? 1093 tree.defs.diff(alreadyEntered) : tree.defs; 1094 memberEnter.memberEnter(defsToEnter, env); 1095 if (isRecord) { 1096 addRecordMembersIfNeeded(tree, env); 1097 } 1098 if (tree.sym.isAnnotationType()) { 1099 Assert.check(tree.sym.isCompleted()); 1100 tree.sym.setAnnotationTypeMetadata(new AnnotationTypeMetadata(tree.sym, annotate.annotationTypeSourceCompleter())); 1101 } 1102 1103 if (tree.sym != syms.objectType.tsym && tree.sym != syms.recordType.tsym) { 1104 if ((tree.sym.flags() & (ABSTRACT | INTERFACE | VALUE_CLASS)) == 0) { 1105 tree.sym.flags_field |= IDENTITY_TYPE; 1106 } 1107 if ((tree.sym.flags() & (ABSTRACT | IDENTITY_TYPE | INTERFACE)) == ABSTRACT) { 1108 if (abstractClassHasImplicitIdentity(tree)) { 1109 tree.sym.flags_field |= IDENTITY_TYPE; 1110 } 1111 } 1112 } 1113 } 1114 1115 // where 1116 private boolean abstractClassHasImplicitIdentity(JCClassDecl tree) { 1117 1118 Type t = tree.sym.type; 1119 1120 if (t == null || t.tsym == null || t.tsym.kind == ERR) 1121 return false; 1122 1123 if ((t.tsym.flags() & HASINITBLOCK) != 0) { 1124 return true; 1125 } 1126 1127 // No instance fields and no arged constructors both mean inner classes cannot be value class supers. 1128 Type encl = t.getEnclosingType(); 1129 if (encl != null && encl.hasTag(CLASS)) { 1130 return true; 1131 } 1132 for (Symbol s : t.tsym.members().getSymbols(NON_RECURSIVE)) { 1133 switch (s.kind) { 1134 case VAR: 1135 if ((s.flags() & STATIC) == 0) { 1136 return true; 1137 } 1138 break; 1139 case MTH: 1140 if ((s.flags() & (SYNCHRONIZED | STATIC)) == SYNCHRONIZED) { 1141 return true; 1142 } else if (s.isConstructor()) { 1143 MethodSymbol m = (MethodSymbol)s; 1144 if (m.getParameters().size() > 0 1145 || m.getTypeParameters().size() > 0 1146 || m.type.getThrownTypes().nonEmpty() 1147 || (m.flags() & EMPTYNOARGCONSTR) == 0 1148 || (Check.protection(m.flags()) > Check.protection(m.owner.flags()))) { 1149 return true; 1150 } 1151 } 1152 break; 1153 } 1154 } 1155 return false; 1156 } 1157 1158 1159 private void addAccessor(JCVariableDecl tree, Env<AttrContext> env) { 1160 MethodSymbol implSym = lookupMethod(env.enclClass.sym, tree.sym.name, List.nil()); 1161 RecordComponent rec = ((ClassSymbol) tree.sym.owner).getRecordComponent(tree.sym); 1162 if (implSym == null || (implSym.flags_field & GENERATED_MEMBER) != 0) { 1163 /* here we are pushing the annotations present in the corresponding field down to the accessor 1164 * it could be that some of those annotations are not applicable to the accessor, they will be striped 1165 * away later at Check::validateAnnotation 1166 */ 1167 TreeCopier<JCTree> tc = new TreeCopier<JCTree>(make.at(tree.pos)); 1168 List<JCAnnotation> originalAnnos = rec.getOriginalAnnos().isEmpty() ? 1169 rec.getOriginalAnnos() : 1170 tc.copy(rec.getOriginalAnnos()); 1171 JCVariableDecl recordField = TreeInfo.recordFields((JCClassDecl) env.tree).stream().filter(rf -> rf.name == tree.name).findAny().get(); 1172 JCMethodDecl getter = make.at(tree.pos). 1173 MethodDef( 1174 make.Modifiers(PUBLIC | Flags.GENERATED_MEMBER, originalAnnos), 1175 tree.sym.name, 1176 /* we need to special case for the case when the user declared the type as an ident 1177 * if we don't do that then we can have issues if type annotations are applied to the 1178 * return type: javac issues an error if a type annotation is applied to java.lang.String 1179 * but applying a type annotation to String is kosher 1180 */ 1181 tc.copy(recordField.vartype), 1182 List.nil(), 1183 List.nil(), 1184 List.nil(), // thrown 1185 null, 1186 null); 1187 memberEnter.memberEnter(getter, env); 1188 rec.accessor = getter.sym; 1189 rec.accessorMeth = getter; 1190 } else if (implSym != null) { 1191 rec.accessor = implSym; 1192 } 1193 } 1194 1195 /** Add the implicit members for an enum type 1196 * to the symbol table. 1197 */ 1198 private void addEnumMembers(JCClassDecl tree, Env<AttrContext> env) { 1199 JCExpression valuesType = make.Type(new ArrayType(tree.sym.type, syms.arrayClass)); 1200 1201 JCMethodDecl values = make. 1202 MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC), 1203 names.values, 1204 valuesType, 1205 List.nil(), 1206 List.nil(), 1207 List.nil(), 1208 null, 1209 null); 1210 memberEnter.memberEnter(values, env); 1211 1212 JCMethodDecl valueOf = make. 1213 MethodDef(make.Modifiers(Flags.PUBLIC|Flags.STATIC), 1214 names.valueOf, 1215 make.Type(tree.sym.type), 1216 List.nil(), 1217 List.of(make.VarDef(make.Modifiers(Flags.PARAMETER | 1218 Flags.MANDATED), 1219 names.fromString("name"), 1220 make.Type(syms.stringType), null)), 1221 List.nil(), 1222 null, 1223 null); 1224 memberEnter.memberEnter(valueOf, env); 1225 } 1226 1227 JCMethodDecl getCanonicalConstructorDecl(JCClassDecl tree) { 1228 // let's check if there is a constructor with exactly the same arguments as the record components 1229 List<Type> recordComponentErasedTypes = types.erasure(TreeInfo.recordFields(tree).map(vd -> vd.sym.type)); 1230 JCMethodDecl canonicalDecl = null; 1231 for (JCTree def : tree.defs) { 1232 if (TreeInfo.isConstructor(def)) { 1233 JCMethodDecl mdecl = (JCMethodDecl)def; 1234 if (types.isSameTypes(types.erasure(mdecl.params.stream().map(v -> v.sym.type).collect(List.collector())), recordComponentErasedTypes)) { 1235 canonicalDecl = mdecl; 1236 break; 1237 } 1238 } 1239 } 1240 return canonicalDecl; 1241 } 1242 1243 /** Add the implicit members for a record 1244 * to the symbol table. 1245 */ 1246 private void addRecordMembersIfNeeded(JCClassDecl tree, Env<AttrContext> env) { 1247 if (lookupMethod(tree.sym, names.toString, List.nil()) == null) { 1248 JCMethodDecl toString = make. 1249 MethodDef(make.Modifiers(Flags.PUBLIC | Flags.RECORD | Flags.FINAL | Flags.GENERATED_MEMBER), 1250 names.toString, 1251 make.Type(syms.stringType), 1252 List.nil(), 1253 List.nil(), 1254 List.nil(), 1255 null, 1256 null); 1257 memberEnter.memberEnter(toString, env); 1258 } 1259 1260 if (lookupMethod(tree.sym, names.hashCode, List.nil()) == null) { 1261 JCMethodDecl hashCode = make. 1262 MethodDef(make.Modifiers(Flags.PUBLIC | Flags.RECORD | Flags.FINAL | Flags.GENERATED_MEMBER), 1263 names.hashCode, 1264 make.Type(syms.intType), 1265 List.nil(), 1266 List.nil(), 1267 List.nil(), 1268 null, 1269 null); 1270 memberEnter.memberEnter(hashCode, env); 1271 } 1272 1273 if (lookupMethod(tree.sym, names.equals, List.of(syms.objectType)) == null) { 1274 JCMethodDecl equals = make. 1275 MethodDef(make.Modifiers(Flags.PUBLIC | Flags.RECORD | Flags.FINAL | Flags.GENERATED_MEMBER), 1276 names.equals, 1277 make.Type(syms.booleanType), 1278 List.nil(), 1279 List.of(make.VarDef(make.Modifiers(Flags.PARAMETER), 1280 names.fromString("o"), 1281 make.Type(syms.objectType), null)), 1282 List.nil(), 1283 null, 1284 null); 1285 memberEnter.memberEnter(equals, env); 1286 } 1287 1288 // fields can't be varargs, lets remove the flag 1289 List<JCVariableDecl> recordFields = TreeInfo.recordFields(tree); 1290 for (JCVariableDecl field: recordFields) { 1291 field.mods.flags &= ~Flags.VARARGS; 1292 field.sym.flags_field &= ~Flags.VARARGS; 1293 } 1294 // now lets add the accessors 1295 recordFields.stream() 1296 .filter(vd -> (lookupMethod(syms.objectType.tsym, vd.name, List.nil()) == null)) 1297 .forEach(vd -> addAccessor(vd, env)); 1298 } 1299 } 1300 1301 private MethodSymbol lookupMethod(TypeSymbol tsym, Name name, List<Type> argtypes) { 1302 for (Symbol s : tsym.members().getSymbolsByName(name, s -> s.kind == MTH)) { 1303 if (types.isSameTypes(s.type.getParameterTypes(), argtypes)) { 1304 return (MethodSymbol) s; 1305 } 1306 } 1307 return null; 1308 } 1309 1310 /* *************************************************************************** 1311 * tree building 1312 ****************************************************************************/ 1313 1314 interface DefaultConstructorHelper { 1315 Type constructorType(); 1316 MethodSymbol constructorSymbol(); 1317 Type enclosingType(); 1318 TypeSymbol owner(); 1319 List<Name> superArgs(); 1320 default JCMethodDecl finalAdjustment(JCMethodDecl md) { return md; } 1321 } 1322 1323 class BasicConstructorHelper implements DefaultConstructorHelper { 1324 1325 TypeSymbol owner; 1326 Type constructorType; 1327 MethodSymbol constructorSymbol; 1328 1329 BasicConstructorHelper(TypeSymbol owner) { 1330 this.owner = owner; 1331 } 1332 1333 @Override 1334 public Type constructorType() { 1335 if (constructorType == null) { 1336 constructorType = new MethodType(List.nil(), syms.voidType, List.nil(), syms.methodClass); 1337 } 1338 return constructorType; 1339 } 1340 1341 @Override 1342 public MethodSymbol constructorSymbol() { 1343 if (constructorSymbol == null) { 1344 long flags; 1345 if ((owner().flags() & ENUM) != 0 && 1346 (types.supertype(owner().type).tsym == syms.enumSym)) { 1347 // constructors of true enums are private 1348 flags = PRIVATE | GENERATEDCONSTR; 1349 } else { 1350 flags = (owner().flags() & AccessFlags) | GENERATEDCONSTR; 1351 } 1352 constructorSymbol = new MethodSymbol(flags, names.init, 1353 constructorType(), owner()); 1354 } 1355 return constructorSymbol; 1356 } 1357 1358 @Override 1359 public Type enclosingType() { 1360 return Type.noType; 1361 } 1362 1363 @Override 1364 public TypeSymbol owner() { 1365 return owner; 1366 } 1367 1368 @Override 1369 public List<Name> superArgs() { 1370 return List.nil(); 1371 } 1372 } 1373 1374 class AnonClassConstructorHelper extends BasicConstructorHelper { 1375 1376 MethodSymbol constr; 1377 Type encl; 1378 boolean based = false; 1379 1380 AnonClassConstructorHelper(TypeSymbol owner, MethodSymbol constr, JCExpression encl) { 1381 super(owner); 1382 this.constr = constr; 1383 this.encl = encl != null ? encl.type : Type.noType; 1384 } 1385 1386 @Override 1387 public Type constructorType() { 1388 if (constructorType == null) { 1389 Type ctype = types.memberType(owner.type, constr); 1390 if (!enclosingType().hasTag(NONE)) { 1391 ctype = types.createMethodTypeWithParameters(ctype, ctype.getParameterTypes().prepend(enclosingType())); 1392 based = true; 1393 } 1394 constructorType = ctype; 1395 } 1396 return constructorType; 1397 } 1398 1399 @Override 1400 public MethodSymbol constructorSymbol() { 1401 MethodSymbol csym = super.constructorSymbol(); 1402 csym.flags_field |= ANONCONSTR | (constr.flags() & VARARGS); 1403 csym.flags_field |= based ? ANONCONSTR_BASED : 0; 1404 ListBuffer<VarSymbol> params = new ListBuffer<>(); 1405 List<Type> argtypes = constructorType().getParameterTypes(); 1406 if (!enclosingType().hasTag(NONE)) { 1407 argtypes = argtypes.tail; 1408 params = params.prepend(new VarSymbol(PARAMETER, make.paramName(0), enclosingType(), csym)); 1409 } 1410 if (constr.params != null) { 1411 for (VarSymbol p : constr.params) { 1412 params.add(new VarSymbol(PARAMETER | p.flags(), p.name, argtypes.head, csym)); 1413 argtypes = argtypes.tail; 1414 } 1415 } 1416 csym.params = params.toList(); 1417 return csym; 1418 } 1419 1420 @Override 1421 public Type enclosingType() { 1422 return encl; 1423 } 1424 1425 @Override 1426 public List<Name> superArgs() { 1427 List<JCVariableDecl> params = make.Params(constructorType().getParameterTypes(), constructorSymbol()); 1428 if (!enclosingType().hasTag(NONE)) { 1429 params = params.tail; 1430 } 1431 return params.map(vd -> vd.name); 1432 } 1433 } 1434 1435 class RecordConstructorHelper extends BasicConstructorHelper { 1436 boolean lastIsVarargs; 1437 List<JCVariableDecl> recordFieldDecls; 1438 1439 RecordConstructorHelper(ClassSymbol owner, List<JCVariableDecl> recordFieldDecls) { 1440 super(owner); 1441 this.recordFieldDecls = recordFieldDecls; 1442 this.lastIsVarargs = owner.getRecordComponents().stream().anyMatch(rc -> rc.isVarargs()); 1443 } 1444 1445 @Override 1446 public Type constructorType() { 1447 if (constructorType == null) { 1448 ListBuffer<Type> argtypes = new ListBuffer<>(); 1449 JCVariableDecl lastField = recordFieldDecls.last(); 1450 for (JCVariableDecl field : recordFieldDecls) { 1451 argtypes.add(field == lastField && lastIsVarargs ? types.elemtype(field.sym.type) : field.sym.type); 1452 } 1453 1454 constructorType = new MethodType(argtypes.toList(), syms.voidType, List.nil(), syms.methodClass); 1455 } 1456 return constructorType; 1457 } 1458 1459 @Override 1460 public MethodSymbol constructorSymbol() { 1461 MethodSymbol csym = super.constructorSymbol(); 1462 /* if we have to generate a default constructor for records we will treat it as the compact one 1463 * to trigger field initialization later on 1464 */ 1465 csym.flags_field |= Flags.COMPACT_RECORD_CONSTRUCTOR | GENERATEDCONSTR; 1466 ListBuffer<VarSymbol> params = new ListBuffer<>(); 1467 JCVariableDecl lastField = recordFieldDecls.last(); 1468 for (JCVariableDecl field : recordFieldDecls) { 1469 params.add(new VarSymbol( 1470 GENERATED_MEMBER | PARAMETER | RECORD | (field == lastField && lastIsVarargs ? Flags.VARARGS : 0), 1471 field.name, field.sym.type, csym)); 1472 } 1473 csym.params = params.toList(); 1474 csym.flags_field |= RECORD; 1475 return csym; 1476 } 1477 1478 @Override 1479 public JCMethodDecl finalAdjustment(JCMethodDecl md) { 1480 List<JCVariableDecl> tmpRecordFieldDecls = recordFieldDecls; 1481 for (JCVariableDecl arg : md.params) { 1482 /* at this point we are passing all the annotations in the field to the corresponding 1483 * parameter in the constructor. 1484 */ 1485 RecordComponent rc = ((ClassSymbol) owner).getRecordComponent(arg.sym); 1486 TreeCopier<JCTree> tc = new TreeCopier<JCTree>(make.at(arg.pos)); 1487 arg.mods.annotations = rc.getOriginalAnnos().isEmpty() ? 1488 List.nil() : 1489 tc.copy(rc.getOriginalAnnos()); 1490 arg.vartype = tc.copy(tmpRecordFieldDecls.head.vartype); 1491 tmpRecordFieldDecls = tmpRecordFieldDecls.tail; 1492 } 1493 return md; 1494 } 1495 } 1496 1497 JCTree defaultConstructor(TreeMaker make, DefaultConstructorHelper helper) { 1498 Type initType = helper.constructorType(); 1499 MethodSymbol initSym = helper.constructorSymbol(); 1500 ListBuffer<JCStatement> stats = new ListBuffer<>(); 1501 if (helper.owner().type != syms.objectType) { 1502 JCExpression meth; 1503 if (!helper.enclosingType().hasTag(NONE)) { 1504 meth = make.Select(make.Ident(initSym.params.head), names._super); 1505 } else { 1506 meth = make.Ident(names._super); 1507 } 1508 List<JCExpression> typeargs = initType.getTypeArguments().nonEmpty() ? 1509 make.Types(initType.getTypeArguments()) : null; 1510 JCStatement superCall = make.Exec(make.Apply(typeargs, meth, helper.superArgs().map(make::Ident))); 1511 stats.add(superCall); 1512 } 1513 JCMethodDecl result = make.MethodDef(initSym, make.Block(0, stats.toList())); 1514 return helper.finalAdjustment(result); 1515 } 1516 1517 /** 1518 * Mark sym deprecated if annotations contain @Deprecated annotation. 1519 */ 1520 public void markDeprecated(Symbol sym, List<JCAnnotation> annotations, Env<AttrContext> env) { 1521 // In general, we cannot fully process annotations yet, but we 1522 // can attribute the annotation types and then check to see if the 1523 // @Deprecated annotation is present. 1524 attr.attribAnnotationTypes(annotations, env); 1525 handleDeprecatedAnnotations(annotations, sym); 1526 } 1527 1528 /** 1529 * If a list of annotations contains a reference to java.lang.Deprecated, 1530 * set the DEPRECATED flag. 1531 * If the annotation is marked forRemoval=true, also set DEPRECATED_REMOVAL. 1532 **/ 1533 private void handleDeprecatedAnnotations(List<JCAnnotation> annotations, Symbol sym) { 1534 for (List<JCAnnotation> al = annotations; !al.isEmpty(); al = al.tail) { 1535 JCAnnotation a = al.head; 1536 if (a.annotationType.type == syms.deprecatedType) { 1537 sym.flags_field |= (Flags.DEPRECATED | Flags.DEPRECATED_ANNOTATION); 1538 setFlagIfAttributeTrue(a, sym, names.forRemoval, DEPRECATED_REMOVAL); 1539 } else if (a.annotationType.type == syms.previewFeatureType) { 1540 sym.flags_field |= Flags.PREVIEW_API; 1541 setFlagIfAttributeTrue(a, sym, names.reflective, Flags.PREVIEW_REFLECTIVE); 1542 } 1543 } 1544 } 1545 //where: 1546 private void setFlagIfAttributeTrue(JCAnnotation a, Symbol sym, Name attribute, long flag) { 1547 a.args.stream() 1548 .filter(e -> e.hasTag(ASSIGN)) 1549 .map(e -> (JCAssign) e) 1550 .filter(assign -> TreeInfo.name(assign.lhs) == attribute) 1551 .findFirst() 1552 .ifPresent(assign -> { 1553 JCExpression rhs = TreeInfo.skipParens(assign.rhs); 1554 if (rhs.hasTag(LITERAL) 1555 && Boolean.TRUE.equals(((JCLiteral) rhs).getValue())) { 1556 sym.flags_field |= flag; 1557 } 1558 }); 1559 } 1560 }